Teodor Sigaev wrote:
> >The behavior of this function is surprising to me.
> >
> >select substring_similarity('dog' , 'hotdogpound') ;
> >
> > substring_similarity
> >----------------------
> > 0.25
> >
> Substring search was desined to search similar word in string:
> contrib_regression=# select substring_similarity('dog' , 'hot dogpound') ;
> substring_similarity
> ----------------------
> 0.75
>
> contrib_regression=# select substring_similarity('dog' , 'hot dog pound') ;
> substring_similarity
> ----------------------
> 1
Hmm, this behavior looks too much like magic to me. I mean, a substring
is a substring -- why are we treating the space as a special character
here?
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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